"Connections are made to the back of the Reserator XT by way of two
industry standard CPC quick-disconnect fittings that incorporate internal
check valves. Having check valves is convenient as they block off flow as
soon as the connection is broken and keeps any spillage to a minimum. In
high-flow systems, integrated check valves can create significant flow
restrictions but in a low-flow system like the Reserator XT, that isn't as
much of a problem and the added convenience is well worth it."